EGS-plan International GmbH Promoting Building Energy Efficiency in Germany 1. Introduction 2. Promoting Building EE in Germany 3. Zero & Plus Energy Buildings 4. Conclusion and outlook Dr.-Ing. Robert Himmler Bangkok, 13.09.2013 Steinbeis-Transferzentrum Energie-, Gebäude- und Solartechnik
Who are we? 1990: Founding of Steinbeis-Transferzentrum Energie-, Gebäude- und Solartechnik Research Projects 2001: Founding of EGS-plan Ingenieurgesellschaft für Energie-, Gebäude- und Solartechnik mbh Energy Concepts, HVAC Design 2007: Founding of EGS-plan International GmbH International Projects Office Stuttgart 20 HVAC engineers 5 Building Physicists 10 energy and sustainability engineers 10 engineers for international projects 2
Engineering services Energy and Sustainability Concepts Computational Building Simulation Design Services (HVAC, Electrical) Measurement and Verification Green Building Certification (LEED & DGNB) Development Services and Technical Cooperation 3
End Energy [kwh/(m²gfa*a)] Averagenew German office Buildings Low Energy Office Building In Hyderabad 1200 International Comparison of End Energy Demand of Office Buildings (no climate correction) 1000 800 600 1015 Green Building Heating Electricity 400 200 704 686 568 477 0 DIC Bur Dubai Deira Grand Hammad 76 73 52 New Tower EVA Study* INFOSYS** United Arab Emirates Qatar Germany India 4
Public awareness in Germany regarding global warming! Only 7 percent of the Germans believe there is no climate change! * IPCCIntergovernmental Panel on Climate Change *Survey from 2012 of TNS Emnid 5
Development of rental and heating costs Increase in percent starting value 1995 = 100 % Average heating costs (oil, gas, dh) Rent 6
Subsidies KfW-70, KfW-50, KfW-40: Loans with reduced interest rates for energy efficient residential buildings Feed in tariff for electricity from photovoltaic Feed in tariff for electricity from CHP 7
Heating Demand in Residential Buildings [kwh/(m 2 a)] Regulations Development of Building Energy Codes in Germany 450 400 Energy Conservation Law 1976 Amendment September 2005 350 300 DIN 4108 250 200 150 1. WSVO 1977 U-value method 2. WSVO 1982 U-value method 100 50 0 1970 1980 1990 1995 2000 1st Oil Crises 2nd Oil Crises 3rd Oil Crises 2020 3. WSVO 1995 Heating Energy Balance [kwh/m 2 a] EnEV 2002 Primary Energy Balance Primary Energy Demand [kwh/m 2 a] Building Physics + Heating System EnEV 2006/ DIN V 18599 Holistic Method to Calculate the Energy Demand for Heating, Cooling and Electricity 8
Energy Conservation Regulation 2007 (EnEV 2007; actual: 2009) Proposed Building Baseline Building Proposed Building Envelope and HVAC Geometry, Area, Orientation, Use Building Envelope and HVAC according to EnEV Calculation of Primary Energy Demand according to DIN 18599 Calculation of Primary Energy Demand according to DIN 18599 Verification: Q P,Proposed Q P,Baseline 9
Calculation of Primary Energy Demand according to Standard DIN 18599 Energy Balance Part 1 Boundary Con. Part 10 HVAC & Cooling Part 7 Ventilation Res. Part 6 Useful Energy Vent. Part 3 Lighting Part 4 Domestic Hot Water Part 6 Room Balance Part 2 Heating Part 5 CHP Part 9 10
Baseline Building (EnEV 2009) Roof U base = 0,20 W/(m 2 K) Wall U base = 0,28 W/(m 2 K) Heat Bridge U HB = 0,05 W/(m 2 K) Ceiling of 1/3 für Gebäude cellar U base = 0,35 W/(m 2 K) Curtainwall facade U base = 1,4 W/(m 2 K); g = 0,48 Solar thermal collector (if the building has high domestic hot water demand) HVAC (same system in baseline and propsed Building, but higher efficiency) Windows U base = 1,3 W/(m 2 K); g = 0 Lighting Motion sensor Daylight control Heating/Domestic Hot Water Condensing boiler 55/45 C 11
Example Energy Passport elobau production building (plus energy factory) Requirements fulfilled Basic building data Primary energy demand of proposed building Minimum primary energy demand (new / renovation) Minimum requirements regarding building envelope Minimum requirements regarding shading Useful energy End energy Primary energy Energy carriers 12
Primary Energy Demand Heating [kwh/(m²a)] Development of the Energy Demand of Buildings in Germany Pilot Projects and Real Estate Market Legal Requirements (German Building Energy Code) Solar Buildings Real Estate Market Pilot Projects as Knowledge / Innovation Transfer Low Energy Buildings Research (Pilot Buildings) 3-Litre-Houses Zero-Heating-Buildings Plus-Energy Buildings 13
Definition of Energy Benchmarks Energy supply to public grid Energy supply greater than energy demand Plus energy Energy supply to building Energy supply to public grid EGS-plan International. www.egs-int.com. ENNA. 30.03.2012 Energy supply less than energy demand Energy savings (Primary) Energy demand 14
SMA Solar Academy - building as power plants HHS- Architects, Kassel Energy Design, Braunschweig 15
Energy Concept Grid independent renewable energy supply 67 kw PV generator roof 31 kw PV generator facade ca. 130 kw P, el 60 Heat Recovery Cooling 40 kw PV mover 30 Training center 40 Electricity demand Heating ca. 70 kw el Converter ca. 230 kwh Renewable energy production portions Cogeneration unit Grid Battery Natural / Biogas Groundwater Facade Roof 16
SMA 33 Comparison Simulation - Measurement SMA 33, Electric Energy Demand Electric Energy Demand [kwh/month] Simulated energy demand Measured energy demand 17
Netto-Energie-PLUS-Gebäude in Berghalde, Leonberg 18
Energy Plus Concept PV 15,3 kw P Solar Energy Lead battery 7 kwh Feed in and back-up Electricity for lighting, utilities, auxiliary, entertainment Domestic hot water heat 3 Earthpobes 100 m each Heatpump 9,6 kw Thermal storage Ambient air Earth-Soil heatexchanger Fresh air ventilation with heat recovery Supply Air 19
Measurement Results 2011 and 2012 PV feed in PV self use PV Gains PV self use / feed in Electric Consumption PV Gains PV self use / feed in Electric Consumption 20
Energy supply today central Gas distribution system Office building Electricity network megawatt power stations flexible? sustainable? factory oil 23
Our Future Vision: Decentralized Energy Supply Smart Grids Smart Homes Smart Buildings E-Mobility Virtual power station 24
Thank you for your Attention! Gropiusplatz 10 D-70563 Stuttgart Tel. +49 711 99 007-5 Fax +49 711 99 007-99 info@egs-int.com www.egs-int.com